York County, South Carolina
18 ZIP codes · Avg score 72/100 · Grade B · Updated 2026-06-04
York County's tap water quality puts it in the upper tier nationally; the 18 ZIP codes here record few health-based violations.
How York County Compares
How York County Compares
York County scores 6 points below the South Carolina state average (78/100) and 4 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: York County, South Carolina
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.7 (asthma 9.5%, diabetes 12.4%)
Estimated additional annual cost per homeowner: $506, driven primarily by flood
Infrastructure: 0.292% avg pipe failure probability, 6% of ZIPs at high risk
38.5% of homes built before 1978 (lead paint era)
Violation History (2023–2025)
→ Stable trendEPA violation counts by year across York County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 21 violations. Past 5 years: 25 total (25 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $506
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
116,561 housing units in York County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in York County
Remediation costs are relatively manageable for most homeowners in York County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for York County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in York County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Rock Hill City of (sc4610002) | 82,846 | 22 |
| 2 | York County West Water District (sc4620003) | 18,273 | 22 |
| 3 | CLOVER TOWN OF (SC4610006) | 8,400 | 17 |
| 4 | York County East Water District (sc4620002) | 30,225 | 16 |
| 5 | York City of (sc4610001) | 8,700 | 12 |
26 total water systems serve York County.
All ZIP Codes in York County
18 ZIP codes tracked in York County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 29717 | Hickory Grove | 83 | B | 0 | $161K |
| 2 | 29715 | Fort Mill | 82 | B | 3 (1 health) | $416K |
| 3 | 29716 | Fort Mill | 82 | B | 3 (1 health) | — |
| 4 | 29731 | Rock Hill | 82 | B | 2 | — |
| 5 | 29733 | Rock Hill | 82 | B | 2 | — |
| 6 | 29734 | Rock Hill | 82 | B | 2 | — |
| 7 | 29742 | Sharon | 81 | B | 1 | $200K |
| 8 | 29704 | Catawba | 80 | B | 2 | $243K |
| 9 | 29708 | Fort Mill | 77 | B | 3 (1 health) | $480K |
| 10 | 29710 | Clover | 77 | B | 7 | $331K |
| 11 | 29730 | Rock Hill | 77 | B | 2 | $239K |
| 12 | 29732 | Rock Hill | 77 | B | 2 | $301K |
| 13 | 29745 | York | 74 | B | 10 (3 health) | $242K |
| 14 | 29703 | Bowling Green | 53 | D | 0 | — |
| 15 | 29712 | Edgemoor | 53 | D | 0 | $199K |
| 16 | 29724 | Lando | 53 | D | 0 | — |
| 17 | 29726 | Mc Connells | 53 | D | 0 | $243K |
| 18 | 29743 | Smyrna | 53 | D | 0 | $233K |
Recommended Buyer Guides for York County
Eight risk categories drive the selection — PFAS exceedance, lead above EPA action level, pre-1978 housing share, EPA Radon Zone 1, flood-top-risk, wildfire-top-risk, multi-contaminant load, and a baseline fallback — and each category maps to a specific buyer-guide track that surfaces when the county data hits its threshold for that hazard signal.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best Sump Pumps — Flood is the top compound risk factor
- Best Mold Test Kits — Flood-driven moisture and mold risk
Deep Dive Reports
Detailed analysis for York County, South Carolina
Overview
York County in South Carolina covers 18 ZIP codes with an average Home Safety Score of B (72/100).
12 of 18 ZIP codes have recorded EPA violations. 6 health-based violations have been documented.
← Back to South Carolina water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.